first of all my specs: I'm using Ubuntu 16.04, my lens is a Tamron 18-270mm F/3,5-6,3 Di II VC PZD and I'm using Darktable 2.0.6. I updated my lensfun library using the article of Torsten Bronger.
My problem: in the lenscorrection module the name of my lens is shown correctly, but all other options are 'greyed' out (see picture below) although the tamron lens is listed correctly in the lensfun .xml file (slr-tamron.xml) under /usr/share/lensfun.
How can I get it to work again? Am I missing something?